Which statement describes the crack repair process discussed?

• A. Drill holes at ends, fit patch over crack, and weld in place.
• B. Weld patch before drilling holes.
• C. Apply patch without drilling or welding.
• D. Use a sealant without patching.

Answer: (A)

The process relies on stopping crack growth with stop-holes at the ends, then securing a patch by welding to seal and reinforce the area. Drilling holes at the crack tips helps spread stress and prevents the crack from propagating when the patch is applied. After the patch is in place, welding it ensures a solid, leak-tight bond that restores structural integrity. Welding the patch first wouldn’t contain the crack as effectively, and patching without any drilling or welding leaves the crack uncontained and weak. Using only a sealant doesn’t provide the necessary structural reinforcement or a true seal across a repaired crack.